Atom probe study of MX to Z-phase transformation in Z-phase strengthened 12%Cr steels
Journal article, 2017

In creep resistant Z-phase strengthened 12% Cr steels, MX to Z-phase transformation plays an important role in achieving a fine distribution of Z-phase precipitates for creep strengthening. Atom probe tomography was employed to investigate the phase transformation in a Nb-based Z-phase strengthened trial steel. Using iso-concentration surfaces with different concentration values, and subtracting the matrix contribution enabled us to reveal the core-shell structure of the transient precipitates between MX and Z-phase. It was shown that Z-phase forms by diffusion of Cr into NbN upon ageing, and Z-phase has a composition corresponding to Cr1+xNb1-xN with x=0.08.


Masoud Rashidi

Chalmers, Physics, Materials Microstructure

Hans-Olof Andrén

Chalmers, Physics, Materials Microstructure

Fang Liu

Materials and manufacture

Microscopy and Microanalysis

1431-9276 (ISSN) 1435-8115 (eISSN)

Vol. 23 360-365

Driving Forces

Sustainable development

Subject Categories

Metallurgy and Metallic Materials

Condensed Matter Physics


Chalmers Materials Analysis Laboratory

Areas of Advance

Materials Science

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